<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script>
function foo()
{
  document.getElementById("ms").setAttribute("foo", "x");
}
</script>
</head>

<body onload="foo()">

<mstyle xmlns="http://www.w3.org/1998/Math/MathML" id="ms" />
</body>

</html>
